초록 ▼

An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure-monitori

An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure-monitoring, saline flushing, or aspirating functions. When an injection is to be made, the valve automatically switches so that the low pressure system is disconnected and not exposed to high pressure, while the syringe pump is connected through the manifold to the catheter.

대표청구항 ▼

An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure-monitori

An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure-monitoring, saline flushing, or aspirating functions. When an injection is to be made, the valve automatically switches so that the low pressure system is disconnected and not exposed to high pressure, while the syringe pump is connected through the manifold to the catheter. nistering the drug to brain tissue at the selected site by passing the drug through the bore; deflating the balloon; removing the delivery catheter from the brain; and withdrawing the guide catheter from the brain. 13. The method of claim 12 wherein the stylet is removed from the passageway before the balloon is inflated. 14. The method of claim 12 wherein the removing and withdrawing actions are performed simultaneously. 15. The method of claim 12 wherein the the balloon is deflated after the drug has been substantially absorbed by brain tissue at the selected site. 16. The method of claim 12 wherein the second opening of the delivery catheter extends beyond the distal opening after the delivery catheter is inserted into the guide catheter. 17. The method of claim 12 wherein the insertion of the guide catheter into the brain and placement near the selected site is aided by use of magnetic resonance imaging. 18. The method of claim 12 wherein both inserting actions are performed before inflating the balloon. 19. The method of claim 12 wherein the guide catheter is polyimide. 20. A method of ensuring effective drug delivery at a selected site in a patient's brain, comprising: preparing for insertion into the brain a guide catheter having proximal and distal ends, proximal and distal openings and a passageway extending therebetween, the guide catheter including a lumen extending from the proximal end to the distal end and terminating at an inflatable balloon; positioning in the passageway a stylet to prevent brain matter from entering the passageway upon insertion of the guide catheter into the brain; inserting into the brain the guide catheter and stylet; removing the stylet from the passageway; inflating the balloon by injecting air through the lumen so that a tract created by the insertion of the guide catheter into the brain is occluded; inserting into the passageway a delivery catheter having a first opening at a first end, a second opening at a second end and an axial bore extending therebetween; administering the drug to brain tissue at the selected site by passing the drug through the bore; deflating the balloon after the drug is substantially absorbed by the brain tissue at the selected site; removing the delivery catheter from the brain; and withdrawing the guide catheter from the brain.